Fake news about king causing conflict (8)
I believe the answer is:
friction
'conflict' is the definition.
(I've seen this before)
'fake news about king' is the wordplay.
'fake news' becomes 'fiction'.
'about' is an insertion indicator.
'king' becomes 'r' (r is abbreviation for rex).
'fiction' enclosing 'r' is 'FRICTION'.
'causing' is the link.
(Other definitions for friction that I've seen before include "animosity" , "The rubbing of one object against another" , "Retarding factor - discord" , "Disagreement" , "Chafing -- disharmony" .)